421121219 has 2 divisors, whose sum is σ = 421121220. Its totient is φ = 421121218.

The previous prime is 421121203. The next prime is 421121221. The reversal of 421121219 is 912121124.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 421121219 - 2⁴ = 421121203 is a prime.

It is a super-2 number, since 2×421121219² = 354686162184091922, which contains 22 as substring.

Together with 421121221, it forms a pair of twin primes.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 421121194 and 421121203.

It is not a weakly prime, because it can be changed into another prime (421121249) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 210560609 + 210560610.

It is an arithmetic number, because the mean of its divisors is an integer number (210560610).

Almost surely, 2^421121219 is an apocalyptic number.

421121219 is a deficient number, since it is larger than the sum of its proper divisors (1).

421121219 is an equidigital number, since it uses as much as digits as its factorization.

421121219 is an evil number, because the sum of its binary digits is even.

The product of its digits is 288, while the sum is 23.

The square root of 421121219 is about 20521.2382423673. The cubic root of 421121219 is about 749.5530486619.

The spelling of 421121219 in words is "four hundred twenty-one million, one hundred twenty-one thousand, two hundred nineteen".